RGD Reference Report - Isolation of two regions on rat chromosomes 5 and 18 affecting mammary cancer susceptibility. - Rat Genome Database

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Isolation of two regions on rat chromosomes 5 and 18 affecting mammary cancer susceptibility.

Authors: Stieber, D  Piessevaux, G  Riviere, M  Laes, JF  Quan, X  Szpirer, J  Szpirer, C 
Citation: Stieber D, etal., Int J Cancer. 2007 Jan 17;.
RGD ID: 1599390
Pubmed: PMID:17230524   (View Abstract at PubMed)
DOI: DOI:10.1002/ijc.22400   (Journal Full-text)

We previously mapped several quantitative trait loci (QTLs) controlling DMBA-induced mammary tumor development in female rats derived from a SPRD-Cu3 (susceptible strain) x WKY (resistant strain) cross. Two of these QTLs were assigned to chromosomes 5 and 18. In the present study, we generated and characterized congenic strains in which a segment of WKY chromosomes 5 or 18 was introduced in the SPRD-Cu3 genetic background, thereby physically demonstrating that each of these two chromosomes controls mammary tumor multiplicity. The chromosome 5 QTL (Mcstm1) accounts for 7 tumors per animal (versus a total of 11 tumors per SPRD-Cu3 rat). The chromosome 18 QTL (Mcstm2) accounts for 3 tumors per animal and is the first chemically-induced mammary cancer susceptibility locus assigned to this chromosome. In addition, the Mcstm1 region was shown to also controls tumor latency. These loci thus play a major role in chemically-induced mammary tumor development. QTLs controlling chemically-induced or estrogen-induced mammary tumor development have independently been identified on chromosomes 5 and 18, using susceptible strains others than SPRD-Cu3. Therefore the haplotype structure of the relevant chromosome regions was analyzed in the different strains. Some chromosome regions were found to be highly mosaic (haplotype blocks < 1 Mb), while one region showed an apparently conserved haplotype block of 7.5 Mb. This analysis points to limited regions that could harbor the causative genes and also indicates that at least Mcstm2 is a novel QTL. (c) 2006 Wiley-Liss, Inc.



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Mammalian Phenotype

Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Mamtr5Ratincreased mammary adenocarcinoma incidence  IDA  RGD 
Mamtr6Ratincreased mammary adenocarcinoma incidence  IDA  RGD 
Mamtr5Ratincreased tumor growth/size  IDA  RGD 
SPRD.WKY-(D5Rat190-D5Rat114)/IbmmRatincreased tumor latency inducedIAGP7,12-dimethyltetraphenecompared to 7,12-dimethyletraphene treated SPRD/ZtmRGD 

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Objects Annotated

QTLs
Mamtr5  (Mammary tumor resistance QTL 5)
Mamtr6  (Mammary tumor resistance QTL 6)


Additional Information